diff --git a/bin/setRunMode b/bin/setRunMode
index 8f33e85..609eeb7 100644
--- a/bin/setRunMode
+++ b/bin/setRunMode
@@ -184,7 +184,9 @@ case "$runMode" in
 		hostName='single'
 			
 		#my.conf		
-		mv -f /etc/my.cnf /etc/my.cnf_bak 
+		if [ -f /etc/my.cnf ] ; then
+			mv -f /etc/my.cnf /etc/my.cnf_bak 
+		fi
 		cp -f ../config/mariadb-50-server.cnf /etc/mysql/mariadb.conf.d/50-server.cnf
 		chmod 644 /etc/mysql/mariadb.conf.d/50-server.cnf
 		echo "set configuration file: /etc/mysql/mariadb.conf.d/50-server.cnf ok!"